1. Isakhiwo se-Roller: indawo enkulu yendawo yokukhishwa ekhishwa, ingcindezi ehlakazayo ye-roller kanye nokuphuma okwandayo;
2. Isakhiwo esisikekile
I-3. Isakhiwo sokuphakelayo: Indandatho yokufa ayiguquki, futhi umgodi omkhulu we-roller ujikeleza, odlala indima ye-centrifugal feedly ngokulinganayo.
4. Uhlelo lokugcoba: Umhlangano we-Roller uhlome ngethangi le-othomathikhi, elingasetshenziswa ngebhotela izinsuku ezingama-2-3;
I-5. Isakhiwo esijikelezayo: ibhokisi lamagiya anohlelo lokuthambisa, nge-torque ezinzile futhi akukho ukufudumala.